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Table 4 Coefficient of determination (R2) to evaluate the influence of weight on left atrial volumes

From: Comparative assessment of left atrial volume in healthy cats by two-dimensional and three-dimensional echocardiography

Method

LAMax

LAMin

EF

SV

R4AL

0.0350

0.1289

0.0903

0.0010

R4

0.0352

0.1359

0.1123

0.0007

L2

0.1206

0.1321

0.0126

0.0658

L4

0.1509

0.1275

0.0007

0.1196

Biplane

0.1661

0.1402

0.0044

0.1202

RTTPE

0.0816

0.0590

0.0024

0.0642

4D-TomTecâ„¢

0.0348

0.0080

0.0120

0.0307

  1. Coefficient of determination (R2) to evaluate the influence of weight on left atrial (LA) maximum (LAMax) and minimum (LAMin) volume as well as on the ejection fraction (EF) and stroke volume (SV) in 50 healthy cats measured with 7 echocardiographic methods: right parasternal 4 chamber view measured with 2D Area/Length method (R4AL) and 2D monoplane Simpson method of discs (R4), left apical two chamber view (L2) and four chamber view (L4) measured with 2D monoplane Simpson method of discs, L2 and L4 combined to biplane volumetry (Biplane), Real Time Triplane Echocardiography (RTTPE) and 4D-TomTecâ„¢ analysing software